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Using your Discipline, you focus your attention on the strange triangular plaque fixed to the bars and, gradually, its purpose becomes clear. By finding the total number of triangles contained in the design and turning the pointer to the same number on the dial before pulling the lever, you will ensure that the portcullis opens safely.

Turn back to 11 and study the design. When you think you have the answer, turn to the entry that bears the same number.¹³